graph LR
subgraph "同步Buck转换器"
A["系统总线 \n 12V/20V"] --> B["输入电容 \n 陶瓷+电解"]
B --> C["VBQG1620 \n 上管"]
C --> D["开关节点"]
D --> E["VBQG1620 \n 下管"]
E --> F["功率地"]
D --> G["Buck电感 \n 2.2µH"]
G --> H["输出电容阵列 \n MLCC"]
H --> I["核心电压 \n 1.0V-3.3V"]
J["Buck控制器"] --> K["栅极驱动器"]
K --> C
K --> E
I -->|电压反馈| J
L["电流检测"] -->|电流反馈| J
end
subgraph "滤波与保护网络"
M["π型滤波"] --> C
N["RC缓冲"] --> D
O["TVS保护"] --> C
P["热敏电阻"] --> Q["温度监控"]
end
style C fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style E fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
智能负载开关管理拓扑详图
graph TB
subgraph "双路负载开关通道"
A["5V辅助电源"] --> B["VBC9216 \n 输入"]
B --> C["内部MOSFET 1"]
B --> D["内部MOSFET 2"]
C --> E["屏幕背光电源"]
D --> F["扬声器功放电源"]
G["主控MCU GPIO"] --> H["电平转换"]
H --> I["使能控制1"]
H --> J["使能控制2"]
I --> C
J --> D
E --> K["背光LED阵列"]
F --> L["音频功放IC"]
end
subgraph "分布式负载开关阵列"
M["3.3V电源"] --> N["VBK1240-1"]
M --> O["VBK1240-2"]
M --> P["VBK1240-3"]
M --> Q["VBK1240-4"]
N --> R["摄像头模组 \n 5MP"]
O --> S["传感器阵列 \n 光/距/加"]
P --> T["LED指示灯 \n RGB"]
Q --> U["WiFi/BT模块"]
V["MCU GPIO"] --> W["控制逻辑"]
W --> N
W --> O
W --> P
W --> Q
end
subgraph "保护与诊断"
X["电流采样"] --> Y["ADC检测"]
Y --> Z["过流保护"]
AA["状态反馈"] --> AB["故障诊断"]
end
style C fill:#fff3e0,stroke:#ff9800,stroke-width:2px
style N fill:#f3e5f5,stroke:#9c27b0,stroke-width:2px
热管理与EMC设计拓扑详图
graph LR
subgraph "PCB级热管理架构"
A["顶部敷铜层"] --> B["散热过孔阵列 \n 0.25mm孔径"]
B --> C["底层敷铜层"]
subgraph "热源分布"
D["VBQG1620 \n 热点区域"]
E["Buck电感 \n 热点区域"]
F["VBC9216 \n 热点区域"]
end
A --> D
A --> E
A --> F
G["温度传感器"] --> H["MCU ADC"]
H --> I["温控策略"]
I --> J["动态频率调节"]
I --> K["负载降额"]
end
subgraph "EMC与信号完整性"
L["电源输入"] --> M["共模电感"]
M --> N["π型滤波器"]
subgraph "去耦网络"
O["大容量电解电容 \n 低频"]
P["MLCC阵列 \n 中高频"]
Q["小容量MLCC \n 高频"]
end
N --> O
O --> P
P --> Q
R["敏感电路区"] --> S["屏蔽罩"]
T["数字地"] --> U["星型接地"]
V["模拟地"] --> U
W["功率地"] --> U
end
subgraph "可靠性增强设计"
X["TVS阵列"] --> Y["接口保护"]
Z["RC缓冲"] --> AA["感性负载"]
AB["肖特基二极管"] --> AC["续流保护"]
AD["看门狗"] --> AE["系统复位"]
AF["电压监测"] --> AG["掉电保护"]
end
style D fill:#e8f5e8,stroke:#4caf50,stroke-width:2px
style F fill:#fff3e0,stroke:#ff9800,stroke-width:2px
点击下载：VBQG1620规格书
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